--- a/SConstruct
+++ b/SConstruct
@@ -53,10 +53,2 @@
 flags = ["-std=c++11", "-Wall", "-Wold-style-cast", "-fno-rtti"]
-if env["mode"] != "debug":
-	flags += ["-Werror", "-O3", "-flto"]
-	env.Append(LINKFLAGS = ["-O3", "-flto"])
-if env["mode"] == "debug":
-	flags += ["-g"]
-elif env["mode"] == "profile":
-	flags += ["-pg"]
-	env.Append(LINKFLAGS = ["-pg"])
 env.Append(CCFLAGS = flags)